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<!----------------------------------------------------------
 
	Copyright (c) 2016-2018 Jean-Marc VIGLINO, 
	released under CeCILL-B (french BSD like) licence: http://www.cecill.info/
	
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	<title>ol-ext: Texture filter </title>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

	<meta name="description" content="Crop and mask filter on an ol map or layer." />
	<meta name="keywords" content="ol3, filter, crop, mask" />

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	<!-- ol-ext -->
	<script type="text/javascript" src="../../dist/ol-ext.js"></script>
	<!-- Extra features: textures -->
	<script type="text/javascript" src="../../dist/extra/TextureImage.js"></script>

	<style>
		input[type="range"] 
		{	vertical-align: middle;
		}
		input[type="number"] 
		{	width:4em;
		}
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<body >
	<a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>

	<a href="../../index.html">
		<h1>ol-ext: Texture filter</h1>
	</a>
	<div class="info">
		<i>ol.filter.Texture</i> add a texture effect on the map. 
	</div>

	<!-- Map div -->
	<div id="map" style="width:600px; height:400px;"></div>

	<div class="options" >
		<ul><li>
			Texture:
			<select id="texture" onchange="setFilter()">
				<option value="wood">wood</option>
				<option value="stone">stone</option>
				<option value="rust">rust</option>
				<option value="metal">metal</option>
				<option value="cardboard">cardboard</option>
				<option value="notebook">notebook</option>
				<option value="https://opengameart.org/sites/default/files/parchment-gold.png.preview.jpg">parchemin</option>
				<option value="https://opengameart.org/sites/default/files/WhiteIrregular_T.jpg">paving</option>
			</select>
		</li><li>
			<input id="active" type="checkbox" checked="checked" /><label for="active"> active</label>
		</li><li>
			<input id="rotate" type="checkbox" checked="checked" /><label for="rotate"> rotate with view</label>
		</li><li>
			 Opacity: <input id="opacity" type="range" min="0" max="1" step="0.1" value="0.7" />
		</li></ul>
	</div>

	<script type="text/javascript">
		$("input").on('change', setFilter);

		var osm = new ol.layer.Tile({ source: new ol.source.OSM() });
		// The map
		var map = new ol.Map
			({	target: 'map',
				view: new ol.View
				({	zoom: 8,
					center: [247044, 6549736.]
				}),
				layers: 
					[	new ol.layer.Tile({ source: new ol.source.Stamen({ layer: 'watercolor' }) }),
						osm
					]
			});

		// Custom filter
		var filter = new ol.filter.Texture();
		osm.addFilter(filter);

		function setFilter()
		{	filter.setActive($("#active").prop('checked'));
			filter.setFilter(
				{	src: $("#texture").val(), 
					rotateWithView: $("#rotate").prop('checked'),
					opacity: Number($("#opacity").val()) 
				});
		}
		setFilter();

	</script>

</body>
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